Add Redux and use it as the navigator

app/features/app/components/App.js

app/features/conference/components/Conference.js

app/features/redux/index.js

app/features/redux/middleware.js

app/features/redux/reducers.js

app/features/redux/store.js

app/features/router/history.js

app/features/router/index.js

app/features/router/middleware.js

app/features/router/reducer.js

app/features/welcome/components/Welcome.js

app/index.js

package-lock.json

package.json

webpack.config.js